<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script type="text/javascript" src="../../script/jquery-1.7.2.js"></script>
    <script type="text/javascript">
        $(function () {
            /*$(":radio").val(["radio2"]);
            $(":checkbox").val(["checkbox1", "checkbox3"]);
            $("#multiple").val(["mul1","mul3"]);
            $("#single").val(["sin3"]);*/

            //    等价于以下代码（无顺序要求）
            $(":radio,:checkbox,#multiple,#single").val(["radio2", "checkbox1", "checkbox3", "mul1", "mul3", "sin3"])
        });
    </script>
</head>
<body> 单选： <input name="radio" type="radio" value="radio1"/>radio1 <input name="radio" type="radio" value="radio2"/>radio2
<br/> 多选： <input name="checkbox" type="checkbox" value="checkbox1"/>checkbox1 <input name="checkbox" type="checkbox"
                                                                                     value="checkbox2"/>checkbox2 <input
        name="checkbox" type="checkbox" value="checkbox3"/>checkbox3 <br/> 下拉多选 ： <select id="multiple"
                                                                                          multiple="multiple" size="4">
    <option value="mul1">mul1</option>
    <option value="mul2">mul2</option>
    <option value="mul3">mul3</option>
    <option value="mul4">mul4</option>
</select> <br/> 下拉单选 ：
<select id="single">
    <option value="sin1">sin1</option>
    <option value="sin2">sin2</option>
    <option value="sin3">sin3</option>
</select></body>
</html>